Lightly toast your tostada shells in a dry skillet for 1-2 minutes before assembly to enhance crunchiness and prevent sogginess from the bean and potato mixture.

Build layers of flavor by seasoning your cumin and chili powder into the beans while sautéing onions and garlic separately for the potatoes, then combine—this prevents flavor dilution and creates complexity.

Dice potatoes into ¼-inch pieces so they cook in 8-10 minutes and achieve crispy edges while remaining tender inside, ensuring consistent texture throughout.

Build tostadas within 5 minutes of serving to maintain the contrast between crispy tostada shells and creamy avocado, as components will soften if assembled too far in advance.

Squeeze fresh lime juice directly on assembled tostadas and add jalapeño slices just before serving to brighten flavors and keep heat from becoming too muted or overpowering.